A modern notebook can be equipped with several devices of wireless
network access technologies, such as Wireless Local Area Network
(WLAN), Wireles Wide Area Network (WWAN), Wireless Personal
Area Network (WPAN), and radio based navigation systems, such as
GNSS (Global Navigation Satellite System). Future mobile devices will
have different radio technologies such as Long Term Evolution (LTE),
Wideband Code Division Multiple Access (WCDMA) and WLAN
transceivers co-existing on the same module that enables such a device
to connect to the different radio technologies.
With these radio technologies present in the same device, care must
be taken to minimize the interference between them. In this master
thesis, we analyze the co-existence of WLAN in the 2.4GHz ISM
band, GSM 1800MHz/900MHz, and WCDMA FDD in the 800MHz
and 2.1GHz band when they are embedded in a notebook. Different
coexistence scenarios have been considered during this work, with focus
on realistic power levels for the victim system as well as the aggressor
system, and the actual antenna coupling measured for different notebooks.
These measurements and the realistic power levels computed are
results that will be a factor to consider when designing WLAN/WWAN
coexistence module.
This work is divided into seven major parts.
Chapter 1 is an introduction to coexistence, and a description of the
different radio access technologies considered.
Chapter 2 is the state of the art. This is a brief discussion of previous
related work on coexistence.
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Chapter 3 is the problem statement definition describing the research
problems and hypothesis.
Chapter 4 describes the measurement plan, devices and parameters
considered in developing the test environment and the different measurement
scenarios.
Chapter 5 presents the measurement setup and procedures undertaken
in achieving the measurement.
Chapter 6 is the result analysis.
Chapter 7 presents conclusion and future work.